20131033 has 4 divisors (see below), whose sum is σ = 21679588. Its totient is φ = 18582480.

The previous prime is 20131031. The next prime is 20131061. The reversal of 20131033 is 33013102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6091024 + 14040009 = 2468^2 + 3747^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131033 - 2¹ = 20131031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1548541 = 20131033 / (2 + 0 + 1 + 3 + 1 + 0 + 3 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774258 + ... + 774283.

It is an arithmetic number, because the mean of its divisors is an integer number (5419897).

Almost surely, 2^20131033 is an apocalyptic number.

It is an amenable number.

20131033 is a deficient number, since it is larger than the sum of its proper divisors (1548555).

20131033 is a wasteful number, since it uses less digits than its factorization.

20131033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548554.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20131033 is about 4486.7619727371. The cubic root of 20131033 is about 272.0332688906.

Adding to 20131033 its reverse (33013102), we get a palindrome (53144135).

The spelling of 20131033 in words is "twenty million, one hundred thirty-one thousand, thirty-three".